Changes between Version 10 and Version 11 of user/clem/Heat_Flux_air-ice-ocean_interface

Timestamp:

2016-05-19T16:52:06+02:00 (8 years ago)

Author:

clem

Comment:

--

user/clem/Heat_Flux_air-ice-ocean_interface

@@ +1 @@
+== Decision? (Update 2016/05/19) ==
+If the atm sends to the ocean/ice: {{{Qsnow = Cp(snow) * Tsnow}}}, and {{{Qrain = Cp(rain) * Train}}}, and {{{Qevap(ice) = Cp(ice) * Tice}}}, and {{{Qevap(ocean) = Cp(ocean) * Toce}}}, then heat is conserved and the differences between atm. physical constants and ocean/ice physical constants are unimportant.
+If the atm does not provide these fluxes, then we will make a guess and we have to make sure to have the same constants between Atm. models and NEMO. This is not yet the case.
+
+
 == Where is the problem? ==
 I spent some time sending emails back and forth trying to solve the problem of heat exchanges at the air - ice/ocean interface, especially those associated with mass exchanges (i.e. heat content of precipitation and evaporation). I think there is a misunderstanding between what the atmosphere expects to send/receive (from an ice-ocean perspective) and what is really sent/received.[[BR]]
@@ -6 +11 @@
 So far, the total non-solar flux (Qns) is imposed by the atmosphere but it excludes (from what I understand) the heat contents of snow precipitation (Qsnow) and rain (Qrain). It also does not take into account the heat content (if any) of evaporated ice and water (Qevap, already in vapor form) that the atmosphere should receive. The total non-solar (conservative) flux should thus be written (including the snow melting when it reaches the ocean):[[BR]]
 
-{{{Qns_tot = Qns + Qsnow + Qrain + Qevap + "Snow-melt-in-ocean"}}}
+{{{Qns_tot = Qns + Qsnow + Qrain + Qevap + "Snow-melt"}}}
 
 
@@ -21 +26 @@
 {{{Qevap (ice)   = 0}}}
 
-{{{"Snow-melt-in-ocean" = sprecip * (1 - ice_frac) * ( - Lfus )}}}
+{{{"Snow-melt" = sprecip * ( - Lfus )}}}
 
 with sprecip = snow precip, lprecip = liquid precip, ice_frac = ice fraction, Cp = specific heat of sea water, Lfus = Latent heat of fusion of pure ice at 0deg, SST = sea surface temperature.[[BR]]